Circuit breaker is a kind of switch device, it can close, bearing and open normal circuit conditions the current, and can turn on, carrying for a specified time and breaking abnormal loop condition ( including the current short circuit condition ). Circuit breaker in our lives is a common electrical equipment, of course, we do not know much about its performance characteristics, the circuit breaker is a collection of advantages in a multi function switch, it generally has the short circuit protection, overload protection, leakage protection function. Circuit breaker connecting a variety of ways, our customers can choose according to their needs different and suitable for their needs connection mode, many connections, wiring in front of the board is the common wiring mode.